<div class="header" >
	<ul>
		<li id="title">紫荆书屋后台管理系统</li>
		<li id="username">
			<span>
				<?php 
					if($ex_user['exchange_status']=='2') {
						echo '<a id="exchange-redirect" goto="duty-table-show/exchange-duty-request.php" class="btn btn-sm btn-danger" style="cursor:pointer;margin-right:15px;">查看换班请求</a>';
					}
					echo $_SESSION['username']; 
				?>
				<a style="cursor:pointer;" id="log-out-btn">退出登录</a>
			</span>
		</li>
	</ul>
</div>